Sixth chapter and second part query code
And the 43 floor almost, need to test construction, we can know what the building said, you know it must know each building will have 655366553765538 of these 65539 numbers (not all numbers) that we also know that a fixed value is 475, then we'll search
(1) 475; 65536; 65537
(2) 475; 65536; 65538; 65537
After checking up these numbers and testing, you can know what the building is. You can skip this number without testing if you search the same code.